Comments in Excel come in handy for documenting your spreadsheet so you can remember what all the formulas are for or to provide instructions for other spreadsheet users. The How-To Geek points out a ...
In Microsoft Excel, you can add Notes to your cells. When the cell has a note, a red indicator will appear at the corner of your cell. If you hover the cursor over the cell, the note will appear.
Click on File > Options > Advanced. In the "Display " section, go to "For cells with comments, show:" Select "No Comments or indicators". Click on Ok to validate.